.popup {
  box-sizing: border-box;
  width: 150px;
  height: 40px;
  background-color: #fff;
  color:#000;
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  display: none;
  flex-direction: column;
  box-shadow: 0 0 2px black;
}
.popup>.middle {
  height: 40px;
  width: 100%;
  font-size: 14px;
  text-align: center;
  line-height: 40px;
}

